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Modular spreader beams are one of many types of lifting beams commonly used throughout the lifting and rigging industry. The question is, what’s the benefit of using a modular beam over forged steel, telescopic spreader beams or center-pick beams? Furthermore, how can a hollow cylinder possibly support such extreme capacities where a steel beam would fail? Understanding the science behind modular spreader beams will provide answers to both questions.
Breaking down the construction of a modular spreader beam, such as those offered by LGH, it’s a rather simple design. Hollow “struts” are sandwiched between end units that contain points to affix high-capacity shackles. Each separate unit is held together with bolts that are tightened, generally, to 110 lb-ft of torque, but higher torque is required on larger capacity setups. One interesting tidbit, while it should NEVER be employed on an active job site, is that when under load, the beam itself can be held together without the bolts. How is that possible, you ask? Let’s take a look.
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